feat: add application yaml (#48385)

airbyte-cdk/bulk/core/base/build.gradle

@@ -50,3 +50,7 @@ dependencies {
     testFixturesApi 'io.micronaut.test:micronaut-test-junit5:4.5.0'
     testFixturesApi 'io.github.deblockt:json-diff:1.1.0'
 }
+
+test {
+    environment "PRESENT", "present-value"
+}

airbyte-cdk/bulk/core/base/src/main/resources/application.yaml

@@ -0,0 +1,4 @@
+airbyte:
+  file-transfer:
+    enabled: ${USE_FILE_TRANSFER:false}
+    staging-path: ${AIRBYTE_STAGING_DIRECTORY:/staging/files}

airbyte-cdk/bulk/core/base/src/test/kotlin/io/airbyte/cdk/initialization/TestApplicationYaml.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.initialization
+
+import io.micronaut.context.annotation.Bean
+import io.micronaut.context.annotation.Factory
+import io.micronaut.context.annotation.Value
+import io.micronaut.test.extensions.junit5.annotation.MicronautTest
+import jakarta.inject.Inject
+import kotlin.test.assertEquals
+import org.junit.jupiter.api.Test
+
+@MicronautTest
+class TestApplicationYaml {
+    @Inject lateinit var defaultValueBean: DefaultValueBean
+
+    @Test
+    fun testMainDefaultValue() {
+        assertEquals("/staging/files", defaultValueBean.stagingFolder)
+        assertEquals(false, defaultValueBean.fileTransferEnable)
+    }
+}
+
+data class DefaultValueBean(
+    val stagingFolder: String,
+    val fileTransferEnable: Boolean,
+)
+
+@Factory
+class TestFactory {
+    @Bean
+    fun defaultValueBean(
+        @Value("\${airbyte.file-transfer.staging-path}") stagingFolder: String,
+        @Value("\${airbyte.file-transfer.enabled}") fileTransferEnable: Boolean,
+    ): DefaultValueBean {
+        return DefaultValueBean(stagingFolder, fileTransferEnable)
+    }
+}